Method of making nuts.



G. DUNHAM. METHGD O' MAKING NUTS.

AlyLIoATIoH .FILED mm. e, 190e.'

Paented July 20; 1909.

i im if: vr 5. l

Mime-*sse Util f f No. 928,508. Elpocicnton of Lettori: Extent. irate-ritmi July ill),

.Application lcil. March 6, .Elorol itilo. elMLlG,

To al/I whom it may concern: l willoiiingr of 'tlm bnr boliforo Honoring lli@ .nut Bo it known that l, Gnomi; llnnri'lizli, o, l lilnir iQ ono olf 1li@ ntlvnntzigris lilo to nw citizen of' the United finitos, residing nt iniprovoinoiit,' lllo ordinary round bolos 'il Unionville, in `the county of linrtiorrl :intl nro. on@ by' one pnnlliotl centrally will; rofor Stilte of Connecticut, havo invented contain. @non to @urli intifnrlofil nntlilftnlf.. "lflio punchw new and useful linprovonionts in llficlzliods inl; of iliona mit llllinlrs i the first slop in of Making Nuts, of which tlm :following lllio bor 'with i number of holt-s :i specification. l it is toon :toil along; over n, My invention relatos to ille method of f "or crowning il'o :mail nntlor :i non@ lo nniking nntn for bolts from ii lint lint of l fililoliu "onorlpllnoliorliiinnioi, winni.

niotlil by morini-s of (lios on@ pinion sind tizio nlrz is indiontnil luy `lnfolrnn liw` :it object of injy' iii'iproveinrnt is ooonoiny oit Fig. 'liio nwoon. j 'pri imw prmluclion by facilitating lli@ mnnl-animo cominci lo lit in@ ci on inno oli ono mit zinl und avoiding one tran ferrino oiinrultioii. f. to lit tlm finir,- ol lull l ol' on@l .ont on that yo ln tlio accom uni/ing drawings :--ll`ignrn l Sitio olf tlm clio town '.,li lin: li

is in edge View of it rectnngnliir not :is stv-u niaiy' n. no roi/sr .1r f @rml from the and of the liar shown in lfl 2a or n not on iti (film tho sziidnnt illustrating@ the result of rtilt n'lir i` third slop in in); niotiioil oi' nmltin nuts. noon nl. ono "nina, snonlil on willor, (mrow '15 is :in algo viow olf wlmi' oA inotlxl nroll in no rlirnolion oi' tlm loigtli oi tim illustrating tliotln'oo stung olf any inotlioil off lian) llizin lilo wiillli nl one :so on to nmlcing nuts troni auch liorf Viggo. :l :ind` 17 rovor nozirly tlm low li ol? tlio l'mr lootwoon :iro reverse plan views of' `tho mit und fluir two adjacent round bolos 'lrlio bor i9 foil Y shown in Figs. l intl 2 irrispootiroly. Figa zit oooh 'fcntl :i (ligtanoo @quill to the, width go lf Violini linzninnr 5 and 6, are plan views of; tin?` init and, nor of ono nut lilalnl; So init no the lnnnnlor do shown in Figo. l and 9 and 2;?- and 4l, refspoomonos .intl torero tlio our upon the crowning; tively. Fig. i iS :i roroieo plan viow of :i lio o, poonlizir Slniporl trnnsmrsio groove lil hexagonal init :is sei/oraal .from the @nel of is 'forniofl in lootn': fi tiro not lili'nilcs mill tho liar Fig. 8, and S is :i rworso plain ont, lnill nl mail olf gzitl mit blinllfzs is 3o View "of a bnr nl instal illnstmting my urowinatl. nll'f" ono anali groom Al0 is niotiiot'l of making nuts; ii'roin, o lint liar of fornimllin 'a a 'wnin lmli' nl two bln` niol'al in tho p1'o(luctionol`; hexagonal n nt llio liar is .tod olong; unil tiionozit n raigii'ig und in wliicli thi suino throne Stops oinployorl or ffron'ninig opor tion will. crown i l ott in tlio protlletion oil? rortnnfgnlazr nnl'fs :gire two moro lllnnlnf: nli'lli tlm orormng lo 'will no illustratie-tl :is proootloil by zi prnliiniiniry ugrnin operato sinon oii til@ tilnnli slop. Fig. E) isn View cimrcwprnnling to wliirli will 'millcrownn nini notonlj] Fig. Il, but in :1j ,Slightly inmliiclil forml crmrn lilo ollior "t iolffinlrtnit My niotliod in i'iznlirnllnly zizii'ilirlili-in i3-o not fir-ft in',

making nuls from o lmr oi' inclini lily morini; porton, :rml rnsn o5 4U of :i gong' olZ (lios nml pnnolioss which if mn any g; rlnnt ifi@ the round hole in lilo not blanks, crown or nimmt-51:; l?" Ylllin' around tho under sido, and thon soi/or tlio nut limb with n i .'iility of f :intr orownoti ifi-oni tho bar by :L dio and pnnclitlnit not init olzinirs in intl. to sin, oriliniirl'y' trimming only cuts-oli' the nut, but al, the sani@ time pnncli anni llio tliftlv ont nfl" t md. nnt lonnit-'Linn trims off the surplus inotnl on all sides. 'ily to sever it iron'a. the loi-ir, amil :it tbn sono my improvement the nut muy be Crowned in, l timo poss lilo lilniiintlironfgli the dio to the bnr after the central holo laas been oli any surplus metal. 'llflie "pnnoli :tor punched by a, simpl@l food of the bnr :intl crowning dio, :intl tl'int lor tlm ooi'o'ring'xoir I without any Currier or transferring lei/ ice trimming (lin ninja either orlont' Vcarry on wt hereby an :intonnitin nmcliine for making orrliinny pilot or Grantor? lto loriigrtiio if@ r nuts muy lio very inncli sinipiifinll sp( 'f ivo blzinloi into tir-i prop o" A, designates n lint bnr of nio' :il tirait io lille mattei-:ll rlio. Tlfn f3 one about :is wide as tho width of the not to loo targus of punching; alle rrninow produced. it nmy be' o trilie nnrrownr crowninv the nut iillinlr. desired, bolzano@ tlio p'nnnliii'ig nml swinging; ll ii v f uglllntl l operations tend to wilon tlile'lmr. ,llnfs l lion-,inse lilo oor rf shown in Fig. if the dies and punches were in a press or machine having a vertically moving slide. The bar would be run through the machine with the flatside at the top. The words top and bottom are used relatively to such a machine. lVliichever side up the bar may be when operated upon I prefer that the swaging or crowning die shall be opposite a hammer which mores to force the bar into the die.

rlhe number of blanks that are formed upon the bar before cutting off will depend upon the spacing of the dies and punches. ln the preferred operation the bar is fed from the right toward the left and the dies are spaced for forn'iing the nut blank on lthe bar as shown. V hole 9 in a nut blank on the bar. The punch for so doing is located where the round hole is indicated by a broken circle. The bar with the hole so punched is fed along the width of one blank and the hole for the second blank punched. At the next feed in addition to punching another hole the forwa rd half of the nut blank at the end of the bar will be crowned. At the next three feeds three more blanks will be crowned leaving the bar in the form shown up to the trai'isverse broken line ll, Figs. 2, l and (i. At the next feed and the seventh blow of the press from the start., the end nut on the bar will be severed on the line l1 and trimmed on its other three sides, and at the same time another nut blank, (or two half blanks,) will be crowned and another hole punched as indicated by the broken circle in Figs. 2, fi and G, resulting in the trimmed nut blank Figs. l., 3 and 5.

`While l. prefer to make the crowning die wide enough to cover one nut blank and a half of a nut blank, (either on one or both sides thcreof,) it is not necessary to do so, as a die may be used which covers but little any more than the face of a single nut blanl... A series of connected nut blanks crowned with such a die is illustrated in Fig. 9, in which A1, designates the bar and l()a lhe first operation is to punch one the first groove that is formed in the bar by the crowning die. In this groove the adja cent uncrowned nut blank, instead of being half crowned as before is only beveled a little on that edge which is adjacent to the groove l0il in Fig. 9." When such avdie is used `the foregoing description of the operal tion should be modified accordingly, that is t to say, the crowning die acts to crown only one blank, instead of one half of two blanks.

Heretofore, small nuts have been crowned in the bar by feeding the bar throu h roller dies7 to the die and punch for punc ing the round hole therein after the blanks were crowned. It was very diliicult to punch these blanks so as `to form the holes concentric to the crowned faces. Ordinarily nut blanks are not crowned until after they have been severed from the bar. By my method of first punching the blanks in the bar, then crowning, and then cutting olf, I am enabled to make the crowned faces and punchings concentric and l also save feeding a cut oftl and crowned nut to the trimming dies.

I claim as my invention y l. The herein described method hof making nuts, which. consists in punching a'round hole in the nut blanks at one end of a flat bar of'nietal, then swaging one side of the said bar to crown the faces of the said punched blanks, and then severing a punched and crowned nut blank from the said bar.

2. The herein described method of making nuts which consists in punching a round hole in the nut blanks at one end of a fiat bar of metal, then swaging one side of the said bar to crown the faces of Athe said punched blanks, and then severing a en ned nut blank from the end of the said bn at the same operation trimming the .s plus metal from the side edges of the said blank.

GEORGE DUNHAM.

Witnesses:

- G. A. MERRIMAN,

M. C. Fos'rinz.

and 

